Step 5: Installing the
Main current transformers
The Main CTs will attach to the incoming
live mains. They should not be used on
neutral lines. They will be installed
differently depending upon whether or not
the home has solar and how that solar
system is connected to the electrical
system. The Vue will be installed differently
depending on whether the solar is a
breaker-fed or a line-side tap installation.
The Main CTs that connect to the mains will
provide net metering out of the box —
displaying electricity used minus electricity
produced. These installations are covered in
the subsequent pages. To monitor
electricity used and electricity produced
separately, Branch CTs will be used as
described in Step 8.
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Step 5(a): No solar Main CT
Step 5(b): Breaker-fed solar Main CT
Step 5(c): Line-side tap solar Main CT